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Genus Delphastus

Lady beetle - Delphastus pusillus - male Delphastus pusilla (LeConte)  - Delphastus pusillus Delphastus pusilla (LeConte) - Delphastus pusillus Whitefly Predator  - Delphastus pusillus - female Tiny Lady Beetle - Delphastus pusillus Cucujiformia - Delphastus Delphastus Very small, very shiny beetle - Delphastus pusillus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Coccinelloidea
No Taxon (Coccinellid group)
Family Coccinellidae (Lady Beetles)
Subfamily Sticholotidinae
Genus Delphastus
Synonyms and other taxonomic changes
Delphastus Casey 1899
5 spp. n. of Mex. (Hoelmer & Pickett 2003)

Delphastus catalinae
Delphastus dejavu
Delphastus pallidus
Delphastus pusillus
Delphastus sonoricus
under 2 mm
Two species, D. dejavu Gordon and D. sonoricus Casey, previously considered conspecific with D. pusillus, have western U.S. distributions.
As a result, the distribution of D. pusillus is now restricted to the eastern half of the U.S., and that of D. catalinae is recorded as extending from Colombia north through Mexico into coastal southern California, and to the east to the island of Trinidad in the West Indies. (Hoelmer & Pickett 2003)
Print References
Hoelmer, K.A. & C.H. Pickett. 2003. Geographic origin and taxonomic history of Delphastus spp. (Coleoptera: Coccinellidae) in commercial culture. Biocontrol Science and Technology, 13(5): 529–535. (Full PDF)
Internet References
Journal of the New York Entomological Society, v.7,p.111 - Casey's original description of the genus